Fish aquarian Dianema - Diapema longibarbis Litter

Dianema - Diapema longibarbis Litter, 1872 Callichthyidae

This somik is widespread in waters of the basin of Amazon. Grows in length up to 9 cm. Sexual dimorphism is expressed not clearly, males have a little more extended beams of chest fins, they are more slender than females. Dianema longibarbis in the nature finds the quiet sites of a surface of the water shaded by coastal vegetation.

Males build foamy nests on the lower party of broad-leaved plants. In bondage the spawning area with it is replaced by the plastic plates with a diameter of 20 cm turned upside down which are hung up under a surface. The female postpones about 300 yellowish berries with a diameter of 1.5 mm in a nest. The nest with berries is protected by a male. Plates with berries transfer to separate vessels. Water: 24 °ts, rn 7.0, dGH 8-10 °, dKH less than 2 °. Water is slightly tinted by methylene blue. The incubatory period (time from fertilization of berries to a vyklevyvaniye of whitebaits) lasts 5 days. Sometimes, that some embryos cannot break through a berry cover, and then they can be helped in easy blows to a cover the end of a goose quill. The Zheltochny bag resolves in 24 hours then whitebaits begin to accept a forage. As the first forage it is better to give to Artemy. The first days to grind it is very sensitive to presence at water of albumens and to temperature drop, is subject to frequent attack of a plesenyama of fungi that can lead of fishes to death. It is possible to avoid it filtering of water through absorbent carbon and frequent change about a half of volume of old water. Eventually the susceptibility of whitebaits to adverse effects decreases to a minimum.

D. longibarbis is absolutely peaceful. In search of food it actively vzmuchivat aquarium soil. Unlike a number of somik, representatives of this sort sometimes freeze in the center of water. They contain groups in spacious aquariums. D. longibarbis loves the twilight, prosperity of shelters in the shaded places of a bottom. In the nature of a dianem often adjoins to a sibling species of D. urostriata with a bright striped tail fin.